<template>
  <div>
    <div class="goods">
      <div class="menu-wrapper" ref="menuWrapper">
        <ul>
          <li
            v-for="(item,index) in goods"
            :key="index"
            class="menu-item"
            :class="{'current':currentIndex===index}"
            @click="selectMenu(index,$event)"
          >
            <span class="text border-1px">
              <span v-show="item.type>0" class="icon" :class="classMap[item.type]"></span>
              {{item.name}}
            </span>
          </li>
        </ul>
      </div>
      <div class="foods-wrapper" ref="foodsWrapper">
        <ul>
          <li v-for="(item,index) in goods" :key="index" class="food-list" ref="foodList">
            <h1 class="title">{{item.name}}</h1>
            <ul>
              <li v-for="(food,index) in item.foods" :key="index" class="food-item border-1px">
                <div class="icon">
                  <img width="57" height="57" :src="food.icon" />
                </div>
                <div class="content">
                  <h2 class="name">{{food.name}}</h2>
                  <p class="desc">{{food.description}}</p>
                  <div class="extra">
                    <span class="count">月售{{food.sellCount}}份</span>
                    <span>好评率{{food.rating}}%</span>
                  </div>
                  <div class="price">
                    <span class="now">￥{{food.price}}</span>
                    <span class="old" v-show="food.oldPrice">￥{{food.oldPrice}}</span>
                  </div>
                  <div class="cartcontrol-wrapper">
                    <Cartcontrol @add="addFood" :food="food"></Cartcontrol>
                  </div>
                </div>
              </li>
            </ul>
          </li>
        </ul>
      </div>
      <Shopcart
        ref="shopcart"
        :selectFoods="selectFoods"
        :deliveryPrice="seller.deliveryPrice"
        :minPrice="seller.minPrice"
        :seller="seller"
      ></Shopcart>
    </div>
    <Food @add="addFood" :food="selectedFood" ref="Food"></Food>
  </div>
</template>
<script>
import BScroll from "better-scroll";
import Shopcart from "./Shopcart";
import Cartcontrol from "./Cartcontrol";
import Food from "./Food";
// var config = require("config");
// config = process.env.NODE_ENV === "development" ? config.dev : config.build;
const ERR_OK = 0;
export default {
  name: "goods",
  props: {
    seller: {
      type: Object
    }
  },
  data() {
    return {
      selectedFoods: {},
      goods: [{ name: "aaa" }],
      listHeight: [],
      scrollY: 0,
      selectedFood: {}
    };
  },
  computed: {
    currentIndex() {
      for (let i = 0; i < this.listHeight.length; i++) {
        let height1 = this.listHeight[i];
        let height2 = this.listHeight[i + 1];
        if (!height2 || (this.scrollY >= height1 && this.scrollY < height2)) {
          return i;
        }
      }
      return 0;
    },
    selectFoods() {
      let foods = [];
      this.goods.forEach(good => {
        good.foods.forEach(food => {
          if (food.count) {
            foods.push(food);
          }
        });
      });
      return foods;
    }
  },
  created() {
    // //如果url里有openid, 设置进cookie
    // var openid = this.$route.query.openid;
    // if (typeof openid !== "undefined") {
    //   var exp = new Date();
    //   exp.setTime(exp.getTime() + 3600 * 1000); //过期时间60分钟
    //   document.cookie = "openid=" + openid + ";expires=" + exp.toGMTString();
    // }
    // //获取openid
    // // if(getCookie('openid') == null) {
    // //      location.href = config.openidUrl + '?returnUrl=' +  encodeURIComponent(config.sellUrl + '/#/');
    // // }
    this.classMap = ["decrease", "discount", "special", "invoice", "guarantee"];
    let selectedGoods = window.selectedGoods;
    selectedGoods = selectedGoods ? JSON.parse(selectedGoods) : [];
    //"http://localhost:8080/sell/buyer/product/list"
    this.$http.get("../../src/static/data.json").then(response => {
      console.log("???????????????????" + response.code);
      // if (response.code === ERR_OK) {
      selectedGoods.map(item => {
        response.data.map((food, index) => {
          food.foods.map((foods, i) => {
            if (foods.id === item.id) {
              food.foods.splice(
                i,
                1,
                Object.assign(food.foods[i], { count: item.count })
              );
              response.data.splice(index, 1, food);
            }
          });
        });
      });
      this.goods = response.data.goods;
      this.$nextTick(() => {
        this._initScroll();
        this._calculateHeight();
      });
      // }
    });
  },
  methods: {
    selectMenu(index, event) {
      if (!event._constructed) {
        return;
      }
      let foodList = this.$refs.foodList;
      let el = foodList[index];
      this.foodsScroll.scrollToElement(el, 300);
    },
    selectFood(food, event) {
      if (!event._constructed) {
        return;
      }
      this.selectedFood = food;
      this.$refs.food.show();
    },
    addFood(target, food) {
      // this._drop(target);
    },
    _drop(target) {
      // 体验优化,异步执行下落动画
      this.$nextTick(() => {
        this.$refs.shopcart.drop(target);
      });
    },
    _initScroll() {
      this.meunScroll = new BScroll(this.$refs.menuWrapper, {
        click: true
      });

      this.foodsScroll = new BScroll(this.$refs.foodsWrapper, {
        click: true,
        probeType: 3
      });

      this.foodsScroll.on("scroll", pos => {
        this.scrollY = Math.abs(Math.round(pos.y));
      });
    },
    _calculateHeight() {
      let foodList = this.$refs.foodList;
      let height = 0;
      this.listHeight.push(height);
      for (let i = 0; i < foodList.length; i++) {
        let item = foodList[i];
        height += item.clientHeight;
        this.listHeight.push(height);
      }
    }
  },
  components: {
    Shopcart,
    Cartcontrol,
    Food
  }
};

// function getCookie(name) {
//   var arr;
//   var reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
//   if ((arr = document.cookie.match(reg))) return unescape(arr[2]);
//   else return null;
// }
</script>
<style lang="scss">
@import "../assets/css/mixin";
.goods {
  display: flex;
  position: absolute;
  top: 174px;
  bottom: 46px;
  width: 100%;
  overflow: hidden;
  .menu-wrapper {
    flex: 0 0 80px;
    width: 80px;
    background: #f3f5f7;
    .menu-item {
      display: table;
      height: 54px;
      width: 56px;
      padding: 0 12px;
      line-height: 14px;
      &.current {
        position: relative;
        z-index: 10;
        margin-top: -1px;
        background: #fff;
        font-weight: 700;
        .text {
          @include border-none();
        }
      }
      .icon {
        display: inline-block;
        vertical-align: top;
        width: 12px;
        height: 12px;
        margin-right: 2px;
        background-size: 12px 12px;
        background-repeat: no-repeat;
        &.decrease {
          @include bg-image("../assets/img/decrease_3");
        }
        &.discount {
          @include bg-image("../assets/img/discount_3");
        }
        &.guarantee {
          @include bg-image("../assets/img/guarantee_3");
        }
        &.invoice {
          @include bg-image("../assets/img/invoice_3");
        }
        &.special {
          @include bg-image("../assets/img/special_3");
        }
      }
      .text {
        display: table-cell;
        width: 56px;
        vertical-align: middle;
        @include border-1px(rgba(7, 17, 27, 0.1));
        font-size: 12px;
      }
    }
  }
  .foods-wrapper {
    flex: 1;
    .title {
      padding-left: 14px;
      height: 26px;
      line-height: 26px;
      border-left: 2px solid #d9dde1;
      font-size: 12px;
      color: rgb(147, 153, 159);
      background: #f3f5f7;
    }
    .food-item {
      display: flex;
      margin: 18px;
      padding-bottom: 18px;
      @include border-1px(rgba(7, 17, 27, 0.1));

      &:last-child {
        @include border-none();
        margin-bottom: 0;
      }
      .icon {
        flex: 0 0 57px;
        margin-right: 10px;
      }
      .content {
        flex: 1;
        .name {
          margin: 2px 0 8px 0;
          height: 14px;
          line-height: 14px;
          font-size: 14px;
          color: rgb(7, 17, 27);
        }
        .desc,
        .extra {
          line-height: 10px;
          font-size: 10px;
          color: rgb(147, 153, 159);
        }
        .desc {
          line-height: 12px;
          margin-bottom: 8px;
        }
        .extra {
          .count {
            margin-right: 12px;
          }
        }
        .price {
          font-weight: 700;
          line-height: 24px;
          .now {
            margin-right: 8px;
            font-size: 14px;
            color: rgb(240, 20, 20);
          }

          .old {
            text-decoration: line-through;
            font-size: 10px;
            color: rgb(147, 153, 159);
          }
        }
        .cartcontrol-wrapper {
          position: absolute;
          right: 0;
          bottom: 12px;
        }
      }
    }
  }
}
</style>